Preparation method and application of metal monatomic catalytic material M-C3N4 for activating soluble oxidant

A technology of catalytic materials and oxidants, applied in chemical instruments and methods, oxidized water/sewage treatment, physical/chemical process catalysts, etc.

Inactive Publication Date: 2021-06-04
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a difficult point about AOP is the efficient activation of soluble oxidants and catalyst reuse
And there are few studies on metal single-atom catalytic materials to activate soluble oxidants and photocatalytic coupling technology
There is currently no information about Cu-C 3 N 4 and Co-C 3 N 4 Research on metal single-atom catalytic materials to activate soluble oxidants coupled with photocatalysis for VOC degradation

Method used

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  • Preparation method and application of metal monatomic catalytic material M-C3N4 for activating soluble oxidant
  • Preparation method and application of metal monatomic catalytic material M-C3N4 for activating soluble oxidant
  • Preparation method and application of metal monatomic catalytic material M-C3N4 for activating soluble oxidant

Examples

Experimental program
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Effect test

Embodiment 1

[0019] to combine figure 1 , 50ml concentration is 10mg / L rhodamine B, add 50mg single-atom catalytic material Cu-C 3 N 4 Stir to mix well, add 50 μl of 30% HO 2 o 2 , using a 50W tungsten-halogen lamp for illumination, and taking a sample every 2 minutes to measure the absorbance. Figure 1 Medium Cu-C 3 N 4 activated H 2 o 2 The removal effect of the coupled photocatalytic system can reach 95% in 16 minutes. It can be seen from the figure that Cu-C 3 N 4 activated H 2 o 2 Synergistic with photocatalysis. Its degradation effect is 10% and 52% higher than the removal efficiency under the conditions of activation and photocatalysis alone.

Embodiment 2

[0021] to combine figure 2 , add 50 μl ethyl acetate to 100ml deionized water, add 50mg single-atom catalytic material Cu-C 3 N 4 Stir to mix well, add 50 μl of 30% HO 2 o 2 , using a 50W halogen tungsten lamp for illumination, and taking a sample every 5 minutes to measure COD. Cu-C 3 N 4 activated H 2 o 2The removal rate of VOC degradation by the coupled photocatalytic system can reach up to 91% in 40 minutes. Its degradation effect is 30% and 6% higher than the removal efficiency under the conditions of activation and photocatalysis alone.

Embodiment 3

[0023] combine image 3 , 50ml concentration is 10mg / L rhodamine B, add 20mg single-atom catalytic material Co-C 3 N 4 Stir and mix evenly, add 50 microliters of PMS with a concentration of 100mM, use a 50W tungsten halogen lamp for illumination, and take a sample every 2 minutes to measure the absorbance. Co-C 3 N 4 The efficiency of the activated PMS-coupled photocatalytic system to degrade rhodamine B can reach 99.9% within 16 minutes.

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Abstract

The invention provides a preparation method and application of a metal monatomic catalytic material M-C3N4 for activating a soluble oxidant, and belongs to the technical field of environmental pollution control. According to the method, urea is used as a raw material, and cobalt nitrate and copper nitrate are added to prepare Cu-C3N4 and Co-C3N4 metal monatomic catalysts respectively; wherein Cu-C3N4 is used for activating H2O2 to degrade VOC and rhodamine B, and Co-C3N4 is used for activating H2O2 and PMS to degrade rhodamine B. The Cu-C3N4 and Co-C3N4 metal monatomic catalytic material is used for activating a soluble oxidizing agent to degrade organic pollutants, and when visible light exists, a coupling effect can be generated by activating the soluble oxidizing agent and photocatalysis.

Description

technical field [0001] The invention relates to a metal single-atom catalytic material M-C for activating a soluble oxidant 3 N 4 The preparation method and application, wherein M-C 3 N 4 Cu-C 3 N 4 and Co-C 3 N 4 , belongs to the technical field of preparation of environmentally friendly new materials. Background technique [0002] Advanced Oxidation Process (AOP) water treatment technology uses soluble oxidants (H 2 o 2 , O 3 , HOCl, PMS, etc.) generate highly reactive free radicals. Free radicals react rapidly and nonselectively with organic pollutants, eventually mineralizing them into harmless small molecules (CO 2 , H 2 O, etc.). However, one difficulty regarding AOPs is the efficient activation and catalyst reuse of soluble oxidants. And there are few studies on metal single-atom catalytic materials to activate soluble oxidants and photocatalytic coupling technology. [0003] The present invention studies a metal single-atom catalyst that can effectivel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/00C02F1/30C02F1/72C02F101/30
CPCB01J27/24B01J35/004B01J35/0046C02F1/30C02F1/725C02F1/722C02F2305/10C02F2101/308
Inventor 柳丽芬韩建清芦旭光
Owner DALIAN UNIV OF TECH
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